C++ Using different subclasses based on part of input - c++

Question

I have some issues solving a task from class. My algorithm for solving the issues is working fine, but my problem is to read data from 3 different text files into 2 different classes.
Now the 1st text file "hours.txt" gives a string id and hour int, like so:
adam1;170
eve2;170
so, separated by a ";".
The next file contains the same id as before and name, taxid, type, and according to type: wage if PH, or salary and ovtwage if IS.
adam1;Adam Driver;12345678;PH;5;
eve2;Eve Assistant;23456789;IS;650;10
The 3rd file contains only the int 160, which is defined as generalWorkingHours. Now to where my problems are arising. I have experience in reading data from 1 file into 1 class but in this case I have to read data to 2 classes, ph and is depending on the type of the id's(adam1 and eve2). I have been provided two classes like this :
#ifndef IS_H
#define IS_H
#include "Employee.h"
#include <iostream>
using namespace std;
class is: public Employee
{
public:
is();
virtual ~is();
void setSalary(int salary);
int getSalary();
void setOvtWage(int ovtWage);
int getOvtWage();
protected:
private:
int salary;
int ovtWage;
};
#endif // IS_H
and
#ifndef PH_H
#define PH_H
#include "Employee.h"
#include <iostream>
using namespace std;
class ph: public Employee
{
public:
ph();
virtual ~ph();
void setWage(int wage);
int getWage();
protected:
private:
int wage;
};
#endif // PH_H
Both of these classes contain the public "Employee"
#ifndef EMPLOYEE_H
#define EMPLOYEE_H
#include <iostream>
using namespace std;
class Employee
{
public:
Employee();
virtual ~Employee();
void setId(string id);
string getId();
void setName(string name);
string getName();
void setTaxId(string taxid);
string getTaxId();
void setType(string type);
string getType();
void setHours(int hours);
int getHours();
protected:
private:
string id;
string name;
string taxid;
string type;
int hours;
};
#endif // EMPLOYEE_H
Now, usually I would create a function to read a file, and one to parse each line like so:
void Resolver::parseTextLine(string tmp, int & carCnt, carList X[]){
std::size_t found;
found=tmp.find(";");
if (found!=string::npos) {
X[carCnt].point=tmp.substr(0,found);
tmp=tmp.substr(found+1);
}
found=tmp.find(";");
if (found!=string::npos) {
X[carCnt].license=tmp.substr(0,found);
tmp=tmp.substr(found+1);
}
found=tmp.find(";");
if (found!=string::npos) {
X[carCnt].time=atoi(tmp.substr(0,found).c_str());
tmp=tmp.substr(found+1);
}
carCnt++;
}
void Resolver::readDataFromFiles(string carFile, int & carCnt, carList X[]){
carCnt=0;
ifstream finS(carFile.c_str(),ios::in);
bool first=true;
while (!finS.eof()) {
string tmp="";
getline(finS,tmp);
if (tmp!="") {
if (first) {
first=!first;
} else {
parseTextLine(tmp,carCnt,X);
}
}
}
finS.close();
}
NOTE: this is just an idea of how I am trying to solve it, but I have no experience with using multiple files and classes. All the functions are premade and I just need to patch it together somehow.

Answer 1

Assuming all the ids are unique, create a map<string, Employee*> Emp; This will store information of all the employee indexed by id as key ("adam1", "eve2") and object as value.
["adam1"] => [object of ph]
["eve2"] => [object of is]
Now, read file_2 which contains information about PH and IS. Now for each line read you will have all the components separated by ";" appearing in the line. After separating components from the line, you should be able to decide (using type) which derived class should be instantiated.
if(type == PH)
{
//suppose id = "adam"
ph *pEmployeePH = new ph();
//also set wage
//insert [id] in map Emp if not already present
}
if(type == IS)
{
//suppose id is now "eve2"
is *pEmployeeIS = new is();
//also set salary and ovtwage
//insert [id] in map Emp if not already present
}
Once you have your map ready, now read file_1. Now for each line read you will have 2 components separated by ";" appearing in the line. After separating components from the line, you should be able to decide (using id) which element of map Emp you should access/modify in order to set the hours.
Suppose id is "adam1" and hours=170, so now check whether map contains ["adam1"] and if does contain then set the hours as follows: Emp[id].setHours(hours);